The correct structure of the product A formed in the reaction [cyclohex-2-enone, H_2 (gas, 1 atmosphere), Pd/carbon, ethanol → A] is
The correct structure of the product \(A\) formed in the reaction [cyclohex-2-enone, \(H_2\) (gas, 1 atmosphere), Pd/carbon, ethanol \(\rightarrow A\)] is

1. [structure shown in figure]
2. [structure shown in figure]
3. [structure shown in figure]
4. [structure shown in figure]